korean english


Home > 게시판 > 세미나

아래와 같이 콜로퀴움을 개최하오니 많이 참석해 주시기 바랍니다.

4시 20분부터 제1과학관 31214 e+강의실에서 다과를 준비하오니 많은 참석 부탁드립니다


아 래


제목: Graphene plasmon and Plasmonics


연사: 황  의  헌 교수님 (성균나노과학기술원, 물리학과) 


일시: 2013년 11월 6일(수) 오후4:30


장소: 제1과학관 31214  e+첨단강의실 


초록: From the dynamical dielectric function of two-dimensional grapheme, which is calculated within the self-consistent-field approximation, we present the long-wavelength plasma oscillation (plasmon) in graphene layers, interacting via the long-range Coulomb interaction. Even though the plasmon in graphene has many desirable properties, including tunability via electrostatic gating and low loss, a combination of graphene layers effectively enhances the plasmonic resonance frequency and magnitude. We present the plasmon dispersion in multilayer graphene. The linear chiral gapless single-particle energy dispersion of graphene leads to plasmon properties with several unexpected experimentally observable characteristic features such as a nontrivial influence of an undoped layer on the multilayer plasmon dispersion and a strange influence from other layers even in the weak-coupling limit. Our predicted plasmon properties in multilayer graphene clearly distinguish graphene from the extensively studied usual parabolic 2D electron systems. We also present the collective excitations of coupled electron-phonon systems, taking into account the nonperturbative Coulomb coupling between electronic excitations in graphene and the substrate longitudinal-optical phonon modes. Our theoretical results provide the basis for the emerging and potentially far-reaching field of graphene plasmonics. The versatility of graphene means that graphene-based plasmonics may enable the manufacture of novel optical devices working in different frequency ranges, from terahertz to the visible, with extremely high speed, low driving voltage, low power consumption and compact sizes.

번호 제목 날짜 조회 수
공지 <12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생 2016.11.28 1056544
681 2019학년도 2학기 콜로퀴움 일정 2019.07.17 424345
680 <12/3> Magnetic couplings, optical spectra, and spin-orbit exciton in 5d Mott insulator Sr2IrO4 2012.11.26 356895
679 <Mar.3(Wed.)>Scaling laws in Natural Language Processing 2021.02.25 314244
678 2017학년도 1학기 콜로퀴움 일정 2017.01.05 282468
677 <10/25> Wave properties of dipole-exchange spin waves in confined magnetic thin films 2006.10.25 263232
676 2020학년도 1학기 콜로퀴움 일정 2020.01.31 253123
675 <5/16> 물리학자가 바라 본 단백질: 왜, 어떻게 연구하는가? 2012.05.10 249457
674 <3/14>Adaptive Optics for the Human Eye and Ophthalmic Applications 2008.03.12 234266
» <11/6> Graphene plasmon and Plasmonics 2013.10.31 232798
672 BK 석학초청 특별세미나 - Frustration and dimensional reduction in multi-orbital systems 2011.10.28 230104
671 <8/30(Wed.)10:30>​Technology convergence and applications of Large-Area Electronics, e-Textiles, bio-sensors and bio-electronics 2017.08.29 226815
670 <6/11> Advanced Physiological Optics and Its Ophthalmic Applications 2014.05.28 226487
669 <6/17> Oscillating Fuzzy Sphere and M5/anti M5 configurations in ABJM model 2009.06.16 224343
668 <12/21> Special Seminar by Professor Ilya Vekhter 2010.11.30 223046
667 <Jan.14(Thu.)>Oxygen sponge effects for epitaxial manganite thin film design 2021.01.11 212862
666 <5/16(토)> 세미나 개최 안내 2015.05.18 205419
665 <11/5(화)> 특별세미나 개최 안내 2013.11.01 198227
664 <Sep. 23(Wed.) 4:30 PM>Grain boundary effect in Metal : A journey of discovery from crystal to thin films without grain boundaries 2015.09.16 196614
663 <June.12(Wed.)> Ribocomputing: Cellular Logic Computation using RNA Devices file 2019.06.07 196018